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What's the difference in Air Filter Types?

Air Filters

The easiest way to maintain your HVAC unit is to change your air filter regularly. The main purpose of air conditioner and furnace filters is to protect the vital components of your system from accumulating dust. Air filters can also improve your indoor air quality by capturing allergens such as mold spores, pollen, pet dander, and even odors. Furnace air filters usually need to be replaced every one to three months, depending on air filter type.

Whole House Air Filters

Whole House Air Filters are also called Residential Air Cleaners, Media Filters, and Whole House Air Cleaners. They all perform identically to remove particles from the air and improve indoor air quality. These larger filters only need to be changed every 6-12 months because of the greater surface area and offer a higher airflow rate due to the increased filter media.

Grille Filters

Grille filters are used in return air vents and grilles of walls and ceilings that have at least a 7-in. depth behind the grille to provide enough space for installation and airflow through the filter. Grille filters provide a much higher rate of airflow and greater efficiency because of the increased surface area and depth of the media compared to a standard 1-in. filter.

Custom Air Filters

Are you struggling to find an air filter that fits properly? Let us build a custom size just for you and put an end to cramming in a filter that is too large or allowing too much air bypass with a filter that is too small. Just enter the size you need, select your MERV rating, and we'll have your order on the way within 2 business days!

What's the Difference in MERV Ratings for Air Filters?

MERV stands for Minimum Efficiency Reporting Value. The MERV system was designed by the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) as a scale to measure the effectiveness of air filters. Basically, this system allows you as the consumer to easily and effectively compare air filters to each other. It means that any MERV 8 rated filter, for example, will filter the same as another. Though there may be some slight differences in construction and quality between manufacturers, the MERV system provides clarity as to the level of filtration you can expect from an air filter with a certain MERV rating.

MERV ratings range from 1-16 and address the performance level of a filter as it relates to removing airborne particles from 0.3 to 10 microns. Airborne particulates are referred to in microns. How small is a micron? A micron is 1/1000 mm which is 1/25,000 of an inch. Although it may be possible to see particles as small as 10 microns under the right conditions, particles are typically visible beginning at about 20 microns. To put it into perspective, a dot (.) is about 600 microns.

MERV rating recommendations:

System Protection Level

Dust Control Level

Allergy Concern Level

MERV 7

Basic

Basic

None

MERV 8

Good

Good

Mild

MERV 11

Better

Better

Moderate

MERV 13

Best

Best

Severe

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